A variable speed drive powers the motor.

A variable speed drive must be installed with this fan, A variable speed drive is integrated within the fan.

A variable speed drive controls the speed of the refrigerant flowing through the compressor.

A cooling member (42) for a variable speed drive (26).

In fixed speed (constant load) applications, a variable speed drive induces additional costs and energy losses.

The mechanism further includes a speed adjustor (16) and control means interacting with the speed adjustor (16) in order to change the driving speed of the ringing device.

motors with an integrated variable speed drive (compact drives) whose energy performance cannot be tested independently from the variable speed drive

An automatic speed variator for bicycle is composed of a speed changing transmission device and a speed changing control device.

A cooling member for a variable speed drive is disclosed.

Positively driven continuously variable speed drive unit.

The invention relates to a stepless speed change gear able to provide a continuously-selectable variation ratio in output angular velocity with respect to input velocity.

A continuously-variable transmission-ratio speed variator (20) is described.

This speed holding system includes at least one speed variator (20) connected to a signal processing device (25).

A variable speed drive is provided for operating a compressor motor in a refrigerant system.

A fluidmechanical pump/engine speed change drive is further described, wherein the pump according to the invention is used.